Any good tips on how to make snow look like snow?

Snow has always been a challenge for me. I am currently working on a new painting for Christmas, and naturally snow is in the scene. However, I always assumed that reflective colors was key, but I just can't ever get it right. Any advice?

@lmrush I remember Will Terry talking about the colour of snow during the very early stages of the Color and Light class...he had a picture of a snowy scene up on the screen and was using the colour picker to choose areas in the snow, then colouring that colour beside the picture - mainly shades of grey - his main point being that you think snow is 'just white' but actually it's almost never white when you analyse colours in a photo. That was really interesting, it made you think about the values and saving the white just for the brightest highlights.

I'd agree with @Kevin-Longueil that Will has done some really lovely snow scenes worth studying, and they never look dark even though they have all so many colours in them apart from white.